Drilling-machine.



PATBNTED 0GT.16, 1906.

R. WHBATBR. DRILLING MACHINE. APPLIGATION FILED JULY2e.19o5.

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Attorneys UNITED sTATEs PATENT OFFICE.

Specification of Letters Patent.

Patented Oct. 16, 1906.

Application filed. July 26, 1905. Serial No. 271,329.

To @ZZ whom t may concern:

Be it known that I, RICHARD WHEATER, a citizen ofthe United States, residing at Novinger, in the county of Adair and State of Missouri, have invented a new and useful Drilling-Machine, of which the following is a specification.

This invention relates to drilling-machines, and is particularly designed for use as a rockdrill in mines and excavating in general.

The prime obj ect ofthe invention is to pro-l vide for regulating the penetration of the drill so as' to readily accommodatethe same, to strata of different degrees of hardness without requiring that the operation of the drill be stopped and without involving any complicated adjustments.

While the drill-bar of the present machine is capable of being driven by power, it has been particularly arranged to bepdriven by hand, either from the side of the bar or from the rear end thereof, according as access may be more readily had to the side or the end of the drill-bar.

In carrying out the foregoing objects it is designed to preserve the usual adjustments of the drill-bar and to provide for conveniently anchoring the frame or drill-post in a simple and eiiective manner.

With these and other objects in view the present invention consists inthe combination and arrangement of parts, as will be hereinafter more fully described, shown in the acvcompanying drawings,

and particularly pointed out in the appended claims, it being understood that changes in the form, proportion, size, and minor details may be made within the scope of the claims without departing from the spirit orsacricing any of the advantages of the invention.

In the accompanying drawings, Figure 1 1s ya side elevation of a drilling-machine embodying the features ofthe present invention, the upper portion of the drill frame or post being broken away to show the overhead anchoring device. view on the line (La of Fig. 1. Fig. 3 is an enlarged plan section taken on the line b b of Fig. 1. Fig. 4 is an enlarged sectional view on the line e e of Fig. 3. Fig. 5 is an enlarged sectional view on the line d d of Fig. 1, brackets for the support of the drill-bar being omitted. Fig. 6 is an enlarged sectional view on the lineff of Fig. 2. Fig. 7 is a detail sectional view illustrating the manner of locking Fig. 2 is a cross-sectional one of the frictional elements. Fig. 8 isa perspective View of the Wrench member for adjusting the shiftable friction element.

Like characters oi reference designate corresponding parts in each and every ligure of the drawings.

For the support of the operating parts of the present drilling-machine there is provided a drill post or frame made up of vertical spaced side bars 1 and 2, which are connected at their tops and bottoms by the upper crosshead 3 and the lower cross-head 4, which are substantial duplicates in construction. As best shown in Fig. 6 of the drawings, it will be seen that the lower cross-head is provided at each end with a transversely-.disposed socket 5 toreceive the adjacent side .bar of the frame, there being a set-screw 6 piercing the frame-bar and the back of the socket to rigidly connect these members. At the center of this cross-bar there is a vertical open-ended threaded seat 7, in which is fitted a threaded bar 8, having a pointed lower end for engagement with the ground and also pierced by a handle-bar 9, whereby the member 8 constitutes a j ack-screw for anchoring the lower end of the frame and for adjusting the height thereof. The upper cross-head 3 is provi-ded with sockets similar yto those of the lower cross-head for the reception of the side bars of the frame and is also provided with set-screws 10 for connecting the side bars and the upper cross-head. A central smooth seat 11 is provided through the upper cross-head for the reception of an anchoring device consisting of a sleeve 12, having a pointed lower end 13 and held in place by means of one or more set-screws 14 piercing the seat of the cross-head. A double-pointed bar or pin 15 telescopes within the open to ofthe sleeve 12 and is adjustably xed therein by means of a set-screw 16 piercing the flanged upper end of the sleeve. By means of the holders or anchoring means thus described the drill post or frame may be readily fixed or anchored in an upright position in a tunnel or the like, as clearly shown in Figs. 1 and 2, the jack-screw 8 being employed to conveniently force the pointed holders into the floor and roof of the tunnel, so as to insure a rigid supporting of the machine.

The drill-bar 1 7 is received between the sides of the drill frame or post and is provided with a thread of long pitch, there being a longitudinal groove 18 formed from end to end of ICO IIO

the bari, so as to form a guideway for a purj pose as will be hereinafter described. This drill-bar rests upon the top of a worm-wheel 19 as a threaded seat, which has a ooncaved periphery for the reception of the bar, andv this wheel in turn rotates loosely upon a shaft 20, which has non-circular terminals 21, supported in corresponding members of a vertical series of seats 22 formed in the front edges of the frame members 1 and 2. It will here be explained that the shaft 2O is held against rotation by reason of its non-circular terminals fitting snugly the seats of the frame, and the shaft may be shifted into any of the corresponding seats for the purpose of raising and lowering the drill-bar.

For the purpose of holding the drill-bar down against the worm-wheel 19 therev is a substantially semitubular cap 23, which frictionally embraces the top of the bar and has one edge hinged to a bracket member 24 and its opposite edge detachably connected to the upper edge of another bracket member 25, said bracket members being loosely pierced by the shaft 2() to permit of the rackets being tilted vertically whenever it is desired to set the drill-bar at different vertical inclinations. The brackets 24 and 25 are 'rigidly connected and maintained spaced by transverse fastenings, one -of which is shown at 26 in Fig. 1 and the other at 27 in Fig. 3.

The means for driving the drill-bar includes a beveled gear 28, received within a bifurcated extension 29 of the bracket 25 and provided with a shaft or journal 30, which is mounted in a bearing 31 upon the bifurcated extension of the bracket, the outer end of the shaft 3() being made non-circular for the reception of a suitably-removable crank-handle for manually rotating the gear. The gear 28 is in mesh with another gear 32, having its hub 33 loosely embracing the drillbar 17 and provided with an internal longitudinal rib or projection 34, slidably received within the groove or guideway 18 of the drillbar, whereby the latter is capablel of slidingl endwise through the gear 32 when being rotated by the latter.. To maintain the gear 32 in mesh with the gear 28, the bracket 24 is provided at its forward end with a hooked guard or keeper 35, which extends aroundthe peripheral edge of the gear 32 and frictionally bears against the front face of the latter, so as to prevent the gear from creeping up on the drill-bar. When access cannot be had to the spindle or shaft 30 of the gear 28, the crank-handle is fitted to the rear end of the drill-bar, which has been made noncircular, as shown at 36 in Fig. 1 of the drawings, for `the reception of the crank-handle, and vice versa.

It will here'be explained that the wormwheel 19 is designed to operate in the capacity of a nut or threaded seat in which the drill-bar is designed to rotate and be fed forwardly thereby, wherefore it is necessary to prevent rotation of the worm-wheel, which is accomplished in the following manner: By reference more particularly to Fig. 5 of the drawings it will be noted that the opposite faces of the member 19 are provided with concentric seats or recesses 37 and 38 for the reception of the respective friction elements 39 and 40. Each of these friction elements is in the nature of a disk having a concentric socket 41 in its inner face, within which is received a rubber disk 42, there being a leather face 43 applied to the inner face of thefriction element and embracing the beveled peripheral edgev portion 44 thereof for contact with the correspondingly-beveled peripheral portion of the seat or recess in the adjacent face of the element 19. The friction member 39 is held against rotation upon the shaft 2O by means of a key or feather 45 and also held against sidewise movement by the same. means. The other end portion of 'the shaft 20 is threaded, as vat 46, and the central opening of the member 40 is also threaded to engage the threaded portion of the shaft, whereby the element 40 may be adjusted toward and away from the wheel 19 to vary the frictional contact between the friction members and the member 19. For convenience in adjusting the element 40 toward and away fromv the member 19 the outer face of the element 4() is provided with an annular series of seats or sockets 47, with any pair of which may be engaged the laterally-directed forked terminal 48 of a wrench member 49, (shown in Fig. 8 of the drawings,) whereby the element 40 may be rotated upon the shaft to adjust it toward or away from the member 19. The other end of the wrench member 49 is provided with a wrench-seat 50, designed to be engaged with the headed end of alocking-pin 51, (shown in Figs. 1 and 7 of the drawings) which is threaded through the bracket 25 and designed for engagement with any one of the seats 47 in the element 40, so as to lock the latter :against rotation after it has been set to any adjusted position. By means of the adjustment of the friction element 40 the wormwheel 19 may be fixed against rotation by setting the element 4() snugly against the wheel, and the wheel may be permitted to rotate slowly by adjustingl the element 40 outwardly, so as to have merely a frictional engagement therewith.

In the operation of the present machine any suitable drill is connected to the forward end of the drill-bar through the medium of the drill-socket 52, and the gear 28 is rotated, so as to rotate the drill-b ar. When the drilling is being done through sand 4or other comparatively loose or soft material, the friction element 40 is set up against the worm-wheel 19 with such a degree of friction as to pre- ISO vent backward rotation of the wheel by the comparatively little resistance offered by the sand to the penetration of the drill, Wherefore the drill-rod will move forwardly at a relatively rapid rate, due to the comparatively long pitch of the threads of the bar,- and the drill will therefore have the greatest amount of penetration. Should the drill strike rock, the resistance oered to the drill-rod will be materially increased, and as the drive power remains the same it willbe necessary to compensate for the decreased penetration of the drill, which is accomplished by reason of the element 19 rotating backwardly by reason of the fact that the drill-rod continues to rotate at the same rate of speed, but does not advance with its original rapidity. Hence damage to the drill and other parts of .the machine is eectually obviated. The porpose of having the friction element 40 adjustablevwith respect to the element 19 is to accommodate the machine to a change of power-for instance, when changing from a man to a boy, in which event the friction element 40 is backed off slightly from the element 19, so as not to offer so strong a frictional resistance to the backward rotation of the element 19 in order to accommodate the machine to the decreased power.

While the present invention makes provision for varying the penetration of the drill, it does not interfere with the usual adjustment of the drill-bar, as the latter may be raised and lowered by shifting the bar 2O into any of the seats 22 of the drill post or frame, and the drill-bar may be tilted vertically upon the supporting-bar 20 as a center by reason of the fact that the brackets 24 and 25 are loose upon the bar 20, and therefore may swing around the latter when the drill-bar is tilted. Furthermore, as the drill-bar and drive elements thereof are all supported upon the bar 20 and the latter is removable from the drill post or frame the drilling mechanism may be removed from the post or frame without disturbing the latter. Moreover, the drill-bar may be lifted from the element 19 and removed therefrom merely by throwing back the holding element 23 without disturbing any of the other parts of the drive mechanism. It will here be explained that the inner or under face of the member 23 is not threaded, but smooth, and is preferably. graphite or the like, so as to inv coated with terfere as little as possible with the advancement of the drill-bar. By reason of the fact that the element 19 rotates friction between and heating of the drill-bar and the member 19 is reduced tothe minimum, lubrication is thereby avoided.

Having thus described the invention, what is claimed is` 1. In a drilling-machine, the combination with a rotary threaded drill-bar, of a wormwheel constituting a seat therefor, a supporting.- shaft for the worm wheel, a bracket upon the shaft, driving mechanism including meshed gears upon the bracket and the drillbar, a friction element having a threaded connection with the shaft for adjustment toward and away from the worm-wheel and provided in one face with an annular series of sockets, and a locking-pin carried by the bracket and capable of engagement with any of the sockets to adjustably lock the friction element.

2. In a drilling-machine, the combination of a pair of spaced brackets, a shaft piercing the brackets and provided with non-circular terminals, a worm-wheel loosely mounted upon the shaft between the brackets, a rotary threaded drill-bar seated upon the periphery of the worm-wheel, a retaining element removably carried by the brackets and arching across the drill-bar to hold the latter in engagement with the worm-wheel, a drivegear carried by one of the brackets upon an axis in substantial parallelism with the shaft, a driven gear in mesh with the drive-gear and loosely embracing the drill-bar, said drill-bar having a longitudinal guideway, the

and frequent driven gear having a key slidably engaging the guideway, and a guard carried by one of the brackets and engaging the driven gear to hold the same in mesh with the drive-gear.

3. In a drilling-machine, the combination of a pair of spaced brackets, a shaft piercing the brackets, one end portion of the shaft being threaded, a worm-wheel loose upon the shaft between the brackets, a threaded drillbar supported upon .the periphery of the worm-wheel, means for driving the drill-bar, a friction element keyed to one end portion of the shaft in cooperative relation with one side of the worm-wheel, and an adjustable friction element fitted to the threaded por-- tion of the shaft in cooperative relation with the other side of the worm-wheel.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

RICHARD WHEATER.

Witnesses:

JONATHAN JACKSON, BERT. TINDELL.

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